一Why do children hang stockings over the fireplace for presents?一As the story goes, to hel

一Why do children hang stockings over the fireplace for presents?
一As the story goes, to help a poor family, Father Christmas threw a small bag of gold down the chimney and it fell into a stocking that＿up to dry over the fireplace.
A. hung
B. had hung
C. was hanging
D. was hanged

A. hungB. had hung(答案→)C. was hangingD. was hanged解析：句意：为什么孩子把长筒袜挂在壁炉上面放礼物？--正如故事说的，为了帮助穷人，圣诞老人会顺着壁炉扔下一袋金子，它会落在壁炉上面的长筒袜里面。因为是讲述故事里面的事情，从前面的句子：Father Christmas threw a small bag of gold down the chimney and it fell into a stocking可知长筒袜是当时正悬挂在壁炉上方，所以用过去进行时，选C。

我明天再问问老师，叫他解释下这个问题